PHP和MySqli获得所有结果

Question

我的数据库中有2行数据，我正在尝试获取所有行

$query = mysqli_query($connection, "select username, email, is_admin from adminUsers");

$results = mysqli_fetch_assoc($query);

我已经尝试了mysqli_fetch_assoc，mysqli_fetch_row，mysqli_fetch_array，所有这些都只返回1行数据。

Answer 1

除了mysqli_fetch_*()之外的

mysqli_fetch_all()个函数，如果支持，则获取一行。循环和获取：

while($row = mysqli_fetch_assoc($query)) {
    print_r($row);
    //or you can echo $row['username'] etc...
    //or store in an array to loop through later
    $rows[] = $row;
}

如果您使用mysqlnd，则有mysqli_fetch_all()或使用：

if(!function_exists('mysqli_fetch_all')) {
function mysqli_fetch_all($result, $resulttype=MYSQLI_BOTH) {
    while($row = mysqli_fetch_array($result, $resulttype)) {
        $rows[] =$row;
    }
    return $rows;
}
}

$results = mysqli_fetch_all($query);

但是你必须遍历所有返回的行：

foreach($results as $row) {
    print_r($row);
    //or you can echo $row['username'] etc...
}

Answer 2

切换到PDO一次性完成...使用PDOStatement::fetchAll

<?php

//.. Do the neccessary PDO connections...
$sth = $dbh->prepare("select username, email, is_admin from adminUsers");
$sth->execute();
$result = $sth->fetchAll();
print_r($result);

<强>（或）

您需要遍历它们[ MySQLi ]

$query = mysqli_query($connection, "select username, email, is_admin from adminUsers");
$res = array();
while($results = mysqli_fetch_assoc($query))
{
 $res[] = $results;
}

print_r($res);

Answer 3

使用while循环获取所有行：

while ($result = mysqli_fetch_assoc($query))
{
    // Rest of your code. See an example below
    echo $result['username'];
}